Today morning I have read the article from The Motley Fool, a famous financial service company from USA. It mentions that several healthcare insurance companies, which are direct rivalries, cooperate together on creating a shared healthcare providers directory with Blockchain-based technology, which can allow the client to choose those doctors/nurses inder the directory. Those companies are included but not limited to UnitedHealth Group, Humana and Quest Diagnostics.
This core of this cooperation is to improve the data as updated as it can, together with lowering the cost. By looking into the data updates issue, USA Federal government can publish those companies by paying fines on not updating the directory as fast as they can. As a result, the use of Blockchain can provide interoperability characterisitics, which can accelerate the data updating process. On the other hand, different companies have no need to maintain their own system on directories, rather the data has been distributed around multiple computers. This must be a great step for healthcare Blockchain in which the initiative of shared directory can provide some insight to the later development of Electronic Health Record.
By the way, the article also mentions that the stock price of those companies may not be rocketed for this cooperation. It is known that the wording of "Blockchain" is still considered as hype in stock market. Many investors think that Blockchain projects are just little try by those big Giant.
https://www.fool.com/investing/2018/04/10/big-healthcare-companies-jump-into-blockchain-but.aspx